The story follows Yoru and Tenjaku, who have both grown up in an orphanage. Yoru went to the orphanage at the age of 10 after suffering domestic violence from her mother. Tenjaku, who was the same age, took care of Yoru at the orphanage. Several years have passed, and now Yoru is a second-year high school student who still has feelings for Tenjaku.
